基于二元脂质系统的颗粒与未溶解的药物晶体通过防止降解和改善透性来增强口服生物可用性
Xiaowei Dong1, Tao Zhang2, Liangqiao Bian3
1Department of Pharmaceutical Sciences, University of North Texas Health Science Center, Fort Worth, TX, USA.
International journal of pharmaceutics
|October 25, 2025
概括
这项研究为olmesartan medoxomil (OLM) 开发了新的脂质固体颗粒 (LSG),在不溶解药物的情况下,提高了625%的口服生物可用性. 这种方法可以保护OLM免受降解,并改善难溶性前药物的吸收.
科学领域:
- 制药科学 制药科学
- 药物运输 药物运输 药物运输
- 生物制药生物制药公司
背景情况:
- 传统的口服药物输送面临着挑战,因为像olmesartan medoxomil (OLM) 这样的溶解性差的药物.
- 低溶解度和过早的水解限制了许多前药物的生物可用性.
- 现有的配方因药物负载低 (1-2%) 和配方困难而扎.
研究的目的:
- 开发一种用于OLM的新型口服配方,具有增强的溶解性和生物可用性.
- 为了克服药物溶解在难溶性前药物的辅助剂中的局限性.
- 为了保护OLM免受过早的降解,并改善其口服吸收.
主要方法:
- 通过对OLM晶体涂层二元脂质系统 (BLS) 来开发OLM脂质固体颗粒 (LSG).
- 评估了药物负载,体外溶解和Caco-2细胞透性试验.
- 评估了OLM LSG对以酶介导的水解的稳定性.
- 在体内进行的药理动力学和组织分布研究.
主要成果:
- 在OLM LSG中实现了10%的药物负载,比传统方法增加了十倍.
- 与之前报告的OLM配方相比,相对生物利用率增加了625%.
- LSG配方保护了OLM免受酶水解,并增强了药物的吸收和透性.
- 通过药理动力学和组织分布分析证实了小肠吸收的增强.
结论:
- 新的OLM LSG配方显著提高了难溶性前药物的口服吸收和生物可用性.
- 用BLS在固体颗粒中涂覆药物晶体,为口服药物输送提供了一种变革性的方法.
- 这种方法消除了在辅助剂中溶解药物的需要,为挑战前药物提供了一个有希望的平台.
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